Eddie Hawkins, called Hudson Hawk has just been released from ten years of prison and is planning to spend the rest of his life honestly. But then the crazy Mayflower couple blackmail him to steal some of the works of Leonardo da Vinci. If he refuses, they threaten to kill his friend Tommy.
The final installment of the Back to the Future trilogy finds Marty digging the trusty DeLorean out of a mineshaft and looking up Doc in the Wild West of 1885. But when their time machine breaks down, the travelers are stranded in a land of spurs. More problems arise when Doc falls for pretty schoolteacher Clara Clayton, and Marty tangles with Buford Tannen.